This chapter discusses and assesses the feasibility of operationalising Growth Point Theory's model of language production in embodied conversational agents (ECAs). First, the chapter outlines the cornerstones of non-modular Growth Point Theory and its empirical basis. It then gives an overview of gesture and speech production models that are currently realised in ECAs, and discuss their potential and limitations with respect to which characteristics of natural speech and gesture they can account for. Finally, it discusses which requirements a technical model must meet in order to be more compatible with Growth Point Theory.